Download/Update Coinomi to latest version.
+Coins, and add ZCL wallet with default settings (Do not alter path).
Fund the ZCL wallet before the fork block.
Wait for fork
Post-fork:
(optional) Move your ZCL to either a new coinomi address, or away from Coinomi (no need), to secure non-exposure of keys before claiming. Doesn't affect your forked coins.
Once BTCP wallet is live in Coinomi (possibly some days after the launch, as the software has to be released, tested and deployed) click on+Coins, and add BTCP wallet, with M/44H/147H/0H derivation path.